Troubleshooting; Verifying The Printer Components; Power Source Verification; Printer Verification - Intermec 6820 Series User Manual

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Chapter 7 Troubleshooting and Diagnostics

Troubleshooting

Verifying the Printer Components

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The printing system is composed of four basic components: Printer, Com-
puter, Power Source, and Communications. Any one of these components
can prevent the printer from functioning properly.

Power Source Verification

Start by verifying that power is available at the printer. Visually inspect the
control panel to verify that the power indicator (Green LED) is lit. If it is
not, press the SET PAGE button and note if the power indicator lights up.
If it does, the power system is all right. If it does not, press the printer reset
button. If the power indicator still does not light, check the power cable,
by connecting it to a different printer. If the power indicator works on the
new printer, then the cable is all right, and the printer that was originally
connected is suspect. If it does not light, then the problem is most likely
the cable or the power source. Depending on the results, either replace the
cable or return the printer for service.

Printer Verification

If the power indicator works properly and the printer still does not print,
then printer errors are noted. If any indicators light when the SET PAGE
button is pressed, or the printer beeps, then refer to the Printer Failure In-
dicators table to determine the problem.
If none of the listed conditions are indicated by the beep codes and LEDs,
yet the printer does not perform properly, then perform a printer self-test.
Press and hold (for several seconds) the FORM FEED and SET PAGE
buttons at the same time, until the printer beeps and all indicator lights
come on. The lights change throughout the test, as it progresses.
At the end of the self-test, the printer generates a report. This report veri-
fies the following: errors detected during self-test, the error history, and the
communication configuration. If the printer self-test report does not print,
then reset the printer. If the report does print after resetting, then the
printer is all right and the reason the printer does not respond to host com-
puter print requests is probably communications or host computer related.
If the report is partially completed, and a printer error occurs during the
printing of self-test, refer to the Printer Failure Indicators table for the
cause of the printer failure.
Perform a Power On Self-Test (POST) to test for errors either by resetting
the printer or powering it up. If any errors, audible error codes, along with
indicator light status, are produced during POST (see the POST Error
Codes table).
If the POST completes without error, try the printer self-test again. If
self-test prints correctly this time, but the printer does not respond to the
host computer, then the problem may be communications or host com-
puter related. If errors are encountered during POST, contact Customer
Support for assistance.
6820 Series 80-Column Printer User's Manual